After I press the global hotkey about 20 of 30 times to switchs between mouse points or drawing the I met the issue as follow

[shencp]

UIThreadException

Oops, gInk crashed! Please include the following information if you plan to contact the developers (a copy of the following information is stored in crash.txt in the application folder):

未将对象引用设置到对象的实例。

Stack Trace: 在 gInk.FormDisplay.timer1_Tick(Object sender, EventArgs e) 位置 H:\Codes\gInk\src\FormDisplay.cs:行号 506 在 System.Windows.Forms.Timer.OnTick(EventArgs e) 在 System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m) 在 System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

[pubpub-zz]

@shencp, I built a fork https://github.com/pubpub-zz/ppInk where I did a lot of robustification. I tried to reproduce it and came to no issue. Would you agree to try it to confirm that it is fixed there?